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A student measured the diameter of a sm...

A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero of circular scale division coincides with 25 divisions above the reference level. If screw gauge has a zero error of -0.004 cm, the correct diameter of the ball is

A

0.053 cm

B

0.525 cm

C

0.521 cm

D

0.529 cm

Text Solution

Verified by Experts

The correct Answer is:
D
Diameter of the ball
D = main scale reading (m) + circular scale reading (n)` xx`least count ( c) -zero error
`=0.5+ 25 xx0.001 -(-0.004) = 0.529 ` cm
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